Views

Creating a custom view in the navigation pane is very easy.

Choose Add library view

Library field (tag)

Add the fields you want e.g. the Composer.

You get a tree with all the composers.

I want a list of classical composers only

Choose Search list

Use the pick list to select the composers you want.

Can't get rid of the unnecessary My Search level.

The drawback of this method is that you have to pick them manually.

Each time a piece of music with a new composer is added, you have to adapt the list

I have my files organized using a folder for each main genre.

Use a File path to the home directory.

The tree expand to the sub folders

A folder expands again to its sub folders

Now I have all composers in the Classical folder..

What ever I do in this folder, each time all the composers will be listed.

Another option is to use a library per genre.